Draw the rest of the cels

Create layers and ink the drawings for cels "2" and onward in the same way as cel "1".

When you have finished inking, your layers will look like this.

If you cannot ink the layer, see "If You Cannot Draw on a Cel (Layer)" .

When you have finished inking, select the [Tool] palette → [Operation] tool → [Edit timeline] tool and click the canvas to check the motion of the line drawings. If there are any issues in the line drawing, fix them before coloring the drawings.